Sensitivity to Gibberellin of Dwarf Foxtail Millet Varieties

Qian, J. and Jia, G. and Zhi, H. and et al, . (2012) Sensitivity to Gibberellin of Dwarf Foxtail Millet Varieties. Crop Science, 52 (3). pp. 1068-1075.

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Dwarf mutants identifi ed from various crop species have been extensively used as valuable resources for breeding lodging resistant elite cultivars. The response of dwarf lines to gibberellic acid 3 (GA3) is important for dwarf mutant identifi cation and classifi cation. Fortyeight foxtail millet [Setaria italica (L.) P. Beauv.] dwarf lines collected from different breeding programs in China were tested for their response to GA3 at the seedling stage. Forty-six of the samples were identifi ed as being sensitive to GA3 treatments and two lines, 84133chunhe and Xianai, were identifi ed as insensitive. For most sensitive lines, seedling, leaf, mesocotyl, and coleoptile showed positive reaction to GA3, increasing their length at most of the concentrations. Root responses to GA3 were diverse but mostly negative. The mesocoty1 is the most sensitive to GA3 solutions with concentrations between 30 and 50 mg kg–1 and is suggested as the best test for gibberellic acid (GA) sensitivity in foxtail millet. The results in this paper indicate that multiple dwarfi ng genes might exist in foxtail millet and that these dwarf lines will be useful for further studies.

Item Type: Article
Additional Information: Authors X. Diao and H. Zhi designed the study and supervised the experiment. H. Zhi, W. Li, Y. Wang, and H. Li collected and planted the samples and helped in laboratory work. J. Qian performed the experiment. G. Jia, Z. Shang, A. Doust, and X. Diao analyzed the data and performed the statistical analysis. J. Qian and G. Jia prepared the fi rst draft of the manuscript and X. Diao and A. Doust edited the manuscript. All authors discussed the results and conclusion and read and approved the fi nal manuscript. This paper was supported by National Sciences Foundation of China (30630045, 30471117), the earmarked fund for Modern Agro-industry Technology Research System of China, National 863 program (2006AA10Z157, 2008AA10Z158), Hebei Natural Sciences Foundation (C2004000697, C2006000725, C2007000972), the Oklahoma Center for the Advancement of Science and Technology (PSB08-007, PS11-035B), and the U.S. Department of Energy (DE-FG02-08ER64636).
Author Affiliation: Foxtail Millet Improvement Center of China, Institute of Millet Crops, Hebei Academy of Agricultural and Forestry Science, Shijiazhuang, 050031, China
Subjects: Crop Improvement
Divisions: Millet
Depositing User: Mr Siva Shankar
Date Deposited: 29 May 2012 03:38
Last Modified: 29 May 2012 03:47
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